2 Kings 10:14-18

Then he said, “Take them alive.” So they took them alive, and slaughtered them at the pit of Beth-eked, forty-two men; and he left none of them.

Now when he had gone from there, he encountered Jehonadab the son of Rechab coming to meet him; and he greeted him and said to him, “Is your heart right, just as my heart is with your heart?” And Jehonadab answered, “It is.” Jehu said, “If it is, give me your hand.” And he gave him his hand, and he pulled him up to him into the chariot.

Then he said, “Come with me and see my zeal for the Lord.” So he had him ride in his chariot.

When he came to Samaria, he killed all who remained to Ahab in Samaria, until he had eliminated them, in accordance with the word of the Lord which He spoke to Elijah. Jehu Destroys Baal Worshipers

Then Jehu gathered all the people and said to them, “Ahab served Baal a little; Jehu will serve him much.